immobility n. + Add to list US //ˌɪmoʊˈbɪɫɪti// UK //ɪmˌəʊbˈɪlɪti// im·mo·bil·i·ty SynonymsAntonymsEtymology Synonyms fixednessstationariness Antonyms mobilityOriginFRMimmobilité→ENimmobility From Middle French immobilité, equivalent to immobile + -ity.